 The nominal latitude of 35°N was later specified by the U.S. Congress.Two years after Ellicott's survey, commissioners representing North Carolina and South Carolina marked a different large rock along the Chattooga River bank with the inscription "Lat 35 AD 1813 NC + S.C." as the juncture where the South Carolina and North Carolina state lines joined.The rock marked by the commissioners in 1813, rather than the rock marked by Ellicott in 1811, is often mistakenly called Ellicott Rock or Ellicott's Rock.